package com.xiaohei.process.service.impl;

import com.alibaba.fastjson2.JSON;
import com.alibaba.fastjson2.JSONObject;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.xiaohei.auth.service.SysUserService;
import com.xiaohei.model.process.Process;
import com.xiaohei.model.process.ProcessRecord;
import com.xiaohei.model.process.ProcessTemplate;
import com.xiaohei.model.system.SysUser;
import com.xiaohei.process.mapper.ProcessMapper;
import com.xiaohei.process.service.MessageService;
import com.xiaohei.process.service.ProcessRecordService;
import com.xiaohei.process.service.ProcessService;
import com.xiaohei.process.service.ProcessTemplateService;
import com.xiaohei.security.custom.LoginUserInfoHelper;
import com.xiaohei.vo.process.ApprovalVo;
import com.xiaohei.vo.process.ProcessFormVo;
import com.xiaohei.vo.process.ProcessQueryVo;
import com.xiaohei.vo.process.ProcessVo;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import lombok.extern.slf4j.Slf4j;
import org.activiti.api.process.model.Deployment;
import org.activiti.bpmn.model.*;
import org.activiti.engine.HistoryService;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.TaskService;
import org.activiti.engine.history.HistoricTaskInstance;
import org.activiti.engine.history.HistoricTaskInstanceQuery;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.activiti.engine.task.TaskQuery;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.zip.ZipInputStream;

@Slf4j
@Service
@SuppressWarnings({"unchecked", "rawtypes"})
public class ProcessServiceImpl extends ServiceImpl<ProcessMapper, Process> implements ProcessService {

    @Autowired
    private ProcessMapper processMapper;

    @Autowired
    private RepositoryService repositoryService;
    @Autowired
    private SysUserService sysUserService;
    @Autowired
    private ProcessTemplateService processTemplateService;
    @Autowired
    private RuntimeService runtimeService;
    @Autowired
    private TaskService taskService;
    @Autowired
    private ProcessRecordService processRecordService;
    @Autowired
    private ProcessService processService;
    @Autowired
    private HistoryService historyService;
    @Autowired
    private MessageService messageService;

    @Override
    public IPage<ProcessVo> selectPage(Page<ProcessVo> pageParam, ProcessQueryVo processQueryVo) {
        IPage<ProcessVo> page = processMapper.selectPage(pageParam, processQueryVo);
        return page;
    }

    @Override
    public void deployByZip(String deployPath) {
        // 定义zip输入流
        InputStream inputStream = this
                .getClass()
                .getClassLoader()
                .getResourceAsStream(deployPath);
        ZipInputStream zipInputStream = new ZipInputStream(inputStream);
        // 流程部署
        Deployment deployment = (Deployment) repositoryService.createDeployment()
                .addZipInputStream(zipInputStream)
                .deploy();

    }

    @Override
    public void startUp(ProcessFormVo processFormVo) {
        //1. 根据当前用户id获取信息
        SysUser sysUser = sysUserService.getById(LoginUserInfoHelper.getUserId());
        //2. 根据审批模版id把模版信息查询出来
        ProcessTemplate processTemplate = processTemplateService.getById(processFormVo.getProcessTemplateId());
        //3. 保存提交审批信息到业务表  oa_process
        Process process = new Process();
        //复制到process中
        BeanUtils.copyProperties(processFormVo,process);
        String workNo = System.currentTimeMillis() + "";
        process.setProcessCode(workNo);
        process.setUserId(LoginUserInfoHelper.getUserId());
        process.setFormValues(processFormVo.getFormValues());
        process.setTitle(sysUser.getName() + "发起" + processTemplate.getName() + "申请");
        process.setStatus(1);
        baseMapper.insert(process);
        //4. 启动流程实例-   runtimeSevice
        //4.1 流程定义key
        String processDefinitionKey = processTemplate.getProcessDefinitionKey();
        //4.2 业务key  processId
        String businessKey = String.valueOf(process.getId());
        //4.3 流程参数  form表单json数据,转换成map集合传入
        String formValues = processFormVo.getFormValues();
        //formdata
        JSONObject jsonObject = JSON.parseObject(formValues);
        JSONObject formData = jsonObject.getJSONObject("formData");
        //遍历formData得到内容封装到一个map集合中去
        Map<String,Object> map = new HashMap<String,Object>();
        for(Map.Entry<String,Object> entry:formData.entrySet()){
            map.put(entry.getKey(),entry.getValue());
        }

        ProcessInstance processInstance = runtimeService
                .startProcessInstanceByKey(processDefinitionKey, businessKey, map);

        //5. 查询审批人 taskService
        //可能有多个
        List<Task> taskList = this.getCurrentTaskList(processInstance.getId());
        List<String> nameList = new ArrayList<String>();
        for(Task task : taskList){
            String assigneeName = task.getAssignee();
            SysUser user = sysUserService.getUserByUsername(assigneeName);  //登录名称
            String name = user.getName();  //真实姓名
            nameList.add(name);

            messageService.pushPendingMessage(process.getId(),user.getId(),task.getId());
        }

        process.setProcessInstanceId(processInstance.getId());
        process.setDescription("等待"+ StringUtils.join(nameList.toArray(),",") + "审批");

        //7. 业务和实例做关联  更新oa_process数据
        baseMapper.updateById(process);
        //记录操作审批的记录
        processRecordService.record(process.getId(),1,"发起申请");
    }

    @Override
    public IPage<ProcessVo> findPending(Page<Process> pageParam) {
        //1. 封装查询条件，根据当前登录的用户名称
        TaskQuery query = taskService.createTaskQuery()
                .taskAssignee(LoginUserInfoHelper.getUsername())
                .orderByTaskCreateTime()
                .desc();

        //2. 调用方法进行分页条件查询，返回list集合，待办任务集合
        //第一个参数：开始位置  第二个参数：每页记录数
        int begin =(int) ((pageParam.getCurrent() - 1) * pageParam.getSize());
        int size = (int) pageParam.getSize();
        List<Task> taskList = query.listPage(begin, size);
        long totalCount = query.count();
        //3. 封装返回list结合数据到list<ProcessVo>
        //List<Task> -- List<ProcessVo>
        List<ProcessVo> processVoList = new ArrayList<>();
        for (Task task : taskList) {
            //从task任务里边获取流程实例的id
            String processInstanceId = task.getProcessInstanceId();
            //根据流程实例id获取实例对象
            ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();
            //从流程实例对象获取业务key ---  processID
            String businessKey = processInstance.getBusinessKey();
            if(businessKey == null) continue;
            //根据业务key获取process对象
            Process process = baseMapper.selectById(Long.parseLong(businessKey));
            //process对象复制
            ProcessVo processVo = new ProcessVo();
            BeanUtils.copyProperties(process,processVo);
            processVo.setTaskId(task.getId());
            //放到最终的processVoList
            processVoList.add(processVo);
        }

        //4. 封装返回的IPage对象
        IPage<ProcessVo> page = new Page<>(pageParam.getCurrent(),pageParam.getSize(),totalCount);
        page.setRecords(processVoList);
        return page;
    }

    //查看审批详情信息
    @Override
    public Map<String, Object> show(Long id) {
        //1. 根据流程id获取流程信息Process
        Process process = baseMapper.selectById(id);
        //2. 根据流程id获取流程记录信息
        LambdaQueryWrapper<ProcessRecord> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ProcessRecord::getProcessId,id);
        List<ProcessRecord> processRecordList = processRecordService.list(wrapper);
        //3. 根据模版id查询模版信息
        ProcessTemplate processTemplate = processTemplateService.getById(process.getProcessTemplateId());
        //4. 判断当前用户是否可以审批  （不可重复审批）
        boolean isApprove = false;
        List<Task> taskList = this.getCurrentTaskList(process.getProcessInstanceId());
        for(Task task : taskList){
            //判断任务审批人是否是当前用户
            if(task.getAssignee().equals(LoginUserInfoHelper.getUsername())){
                isApprove = true;
            }
        }
        //5. 查询
        Map<String,Object> map = new HashMap<>();
        map.put("process", process);
        map.put("processRecordList", processRecordList);
        map.put("processTemplate", processTemplate);
        map.put("isApprove", isApprove);
        return map;
    }

    @Override
    public void approve(ApprovalVo approvalVo) {
        //1. 从approvalVo里获取任务id，根据任务id获取流程变量
        String taskId = approvalVo.getTaskId();
        Map<String, Object> variables = taskService.getVariables(taskId);
//        for(Map.Entry<String, Object> entry : variables.entrySet()){
//            System.out.println(entry.getKey());
//            System.out.println(entry.getValue());
//        }
        //2. 判断审批状态值
        if(approvalVo.getStatus() == 1){
            //2.1 status为1则审批通过
            Map<String, Object> variable = new HashMap<>();
            taskService.complete(taskId,variable);
        }else {
            //2.2 status为-1则流程直接结束
            this.endTask(taskId);
        }

        //3. 记录审批相关过程信息  oa_process_record
        String description = approvalVo.getStatus().intValue() == 1 ? "已通过" : "驳回";
        processRecordService.record(approvalVo.getProcessId(),
                approvalVo.getStatus(),description);

        //4 查询流程中下一个审批人,更新流程表process中记录
        Process process = baseMapper.selectById(approvalVo.getProcessId());
        //查询任务
        List<Task> taskList = this.getCurrentTaskList(process.getProcessInstanceId());
        if(!CollectionUtils.isEmpty(taskList)){
            List<String> assignList = new ArrayList<String>();
            for(Task task : taskList){
                assignList.add(sysUserService.getUserByUsername(task.getAssignee()).getName());

                messageService.pushProcessedMessage(process.getId(),LoginUserInfoHelper.getUserId(),1);
            }
            //更新process信息
            process.setDescription("等待" + StringUtils.join(assignList.toArray(), ",") + "审批");
            process.setStatus(1);
        }else{
            //更新信息
            if(approvalVo.getStatus().intValue() == 1){
                process.setDescription("审批通过");
                process.setStatus(2);
            }else {
                process.setDescription("审批未通过");
                process.setStatus(-1);
            }
        }
        //推送消息给申请人
        messageService.pushProcessedMessage(process.getId(), process.getUserId(), approvalVo.getStatus());
        baseMapper.updateById(process);
    }

    //已处理任务的查询
    @Override
    public IPage<ProcessVo> findProcess(Page<ProcessVo> pageParam) {
        //封装查询条件
        HistoricTaskInstanceQuery query = historyService.createHistoricTaskInstanceQuery()
                .taskAssignee(LoginUserInfoHelper.getUsername())
                .finished().orderByTaskCreateTime().desc();
        //调用方法条件分页查询,返回list集合
        //开始位置  和  每页记录数
        int begin = (int) ((pageParam.getCurrent() - 1) * pageParam.getSize());
        int size = (int) pageParam.getSize();
        List<HistoricTaskInstance> list = query.listPage(begin, size);
        long totalCount = query.count();
        //遍历返回list集合，封装List<ProcessVo>
        List<ProcessVo> processVoList = new ArrayList<>();
        for(HistoricTaskInstance item : list){
            //流程实例id
            String processInstanceId = item.getProcessInstanceId();
            //根据流程实例id查询获取process信息
            LambdaQueryWrapper<Process> wrapper = new LambdaQueryWrapper<>();
            wrapper.eq(Process::getProcessInstanceId,processInstanceId);
            Process process = baseMapper.selectOne(wrapper);
            //process -- processVo
            ProcessVo processVo = new ProcessVo();
            BeanUtils.copyProperties(process,processVo);
            //放到list集合中
            processVoList.add(processVo);
        }

        //IPage封装分页查询所有数据，返回
        IPage<ProcessVo> pageModel = new Page<>(pageParam.getCurrent(),pageParam.getSize(),totalCount);
        pageModel.setRecords(processVoList);

        return pageModel;
    }

    //查看已发起
    @Override
    public IPage<ProcessVo> findStarted(Page<ProcessVo> pageParam) {
        ProcessQueryVo  processQueryVo = new ProcessQueryVo();
        processQueryVo.setUserId(LoginUserInfoHelper.getUserId());
        IPage<ProcessVo> pageModel = baseMapper.selectPage(pageParam, processQueryVo);
        return pageModel;
    }

    //结束流程
    private void endTask(String taskId) {
        //1. 根据任务id获取任务对象 Task
        Task task = taskService.createTaskQuery().taskId(taskId).singleResult();
        //2. 获取流程定义模型BpmnModel
        BpmnModel bpmnModel = repositoryService.getBpmnModel(task.getProcessDefinitionId());
        //3. 获取结束的流向节点
        List<EndEvent> endEventList = bpmnModel.getMainProcess().findFlowElementsOfType(EndEvent.class);
        if(CollectionUtils.isEmpty(endEventList)) return;
        FlowNode endFlowNode = endEventList.get(0);
        //4. 当前流向节点
        FlowNode currentFlowNode = (FlowNode) bpmnModel.getMainProcess().getFlowElement(task.getTaskDefinitionKey());
        //  临时保存当前活动的原始方向
        List originalSequenceFlowList = new ArrayList<>();
        originalSequenceFlowList.addAll(currentFlowNode.getOutgoingFlows());
        //  清理活动方向
        //5. 清理当前流动方向
        currentFlowNode.getOutgoingFlows().clear();
        //6. 创建新流向
        SequenceFlow newSequenceFlow = new SequenceFlow();
        newSequenceFlow.setId("newSequenceFlow");
        newSequenceFlow.setSourceFlowElement(currentFlowNode);
        newSequenceFlow.setTargetFlowElement(endFlowNode);

        //7. 当前节点指向新方向
        List newSequenceFlowList = new ArrayList();
        newSequenceFlowList.add(newSequenceFlow);
        currentFlowNode.setOutgoingFlows(newSequenceFlowList);

        //8. 完成当前任务
        taskService.complete(taskId);
    }

    //当前任务的列表
    private List<Task> getCurrentTaskList(String id) {
        List<Task> taskList = taskService.createTaskQuery().processInstanceId(id).list();
        return taskList;
    }

}
